Diagenetic Fluid and Its Impact on Sandstone Reservoirs in the Southern Boxing Sag, Dongying Depression, Bohai Bay Basin, China

Figure 17

Spider diagram of the pattern of rare earth element (REE). Chondrite-normalized REE patterns in (a) mudstones and data from Bai et al. [14] and in carbonate cements within Es3x interval from (b) F25 and (c) F104 wells, respectively.

(a)

(b)

(c)